/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.constant.visitor;

import proguard.classfile.Clazz;
import proguard.classfile.constant.*;
import proguard.classfile.util.SimplifiedVisitor;

/**
 * This ConstantVisitor travels from any method handle constants that it visits to their methodref constants, and
 * applies a given constant visitor.
 *
 * @author Eric Lafortune
 */
public class MethodrefTraveler extends SimplifiedVisitor implements ConstantVisitor {
    private ConstantVisitor methodrefConstantVisitor;

    /**
     * Creates a new v that will delegate to the given constant visitor.
     */
    public MethodrefTraveler(ConstantVisitor methodrefConstantVisitor) {
        this.methodrefConstantVisitor = methodrefConstantVisitor;
    }

    // Implementations for ConstantVisitor.

    public void visitAnyConstant(Clazz clazz, Constant constant) {}

    public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant) {
        clazz.constantPoolEntryAccept(methodHandleConstant.u2referenceIndex, methodrefConstantVisitor);
    }
}
